Service quick specs OEM factory data
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4.5 qt of 5W-30 API engine oil, SAE 75W · SYNTHETIC in the differential, DOT 3 brake fluid. Torque lug nuts to 140 ft-lbs. The firing order is 1-8-7-2-6-5-4-3. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
Lubricants & capacities
| Automatic Transmission Fluid | ATF |
| Automatic Transmission Fluid Capacity | 7.4 |
| Brake Fluid | DOT 3 |
| Differential Gear Oil | 80W-90 · GL-5 |
| Differential Gear Oil Capacity | 2.5 qt |
| Differential Gear Oil | SAE 75W · SYNTHETIC |
| Differential Gear Oil Capacity | 6.6 qt |
| Engine Coolant | DEX-COOL OR EQUIVALENT |
Engine torques
| Cylinder Head Steps | Install the NEW cylinder head bolts. |
| Intake Manifold to Engine Bolts | Right: 15 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 28 ft-lbs |
| Intake Manifold to Engine Bolts | Lower: 2nd |
| Intake Manifold to Engine Bolts | 7.4 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 15.0 ft-lbs |
| Intake Manifold to Engine Bolts | 7.4 ft-lbs |
| Intake Manifold to Engine Bolts | 7.4 ft-lbs |
Chassis torques
| Leaf Spring to Axle (U-bolts) | 103.0 ft-lbs |
| Leaf Spring to Chassis Bracket | 107.0 ft-lbs |
| Leaf Spring to Rear Shackle | 66.0 ft-lbs |
| Leaf Spring Rear Shackle to Chassis Bracket | 66.0 ft-lbs |
| Lug Nuts | 140 ft-lbs |
| Transfer Case Fill Plug | 18.0 ft-lbs |
| Transfer Case Drain Plug | 18.0 ft-lbs |
| Front Wheel Hub | 155 ft-lbs |
Ignition
| Cylinder Firing Order | 1-8-7-2-6-5-4-3 |
| Cylinder Firing Order | 1-6-5-4-3-2 |
| Cylinder Firing Order | 1-8-7-2-6-5-4-3 |
| Cylinder Firing Order | 1-8-7-2-6-5-4-3 |
| Spark Plug Manufacturer | AC Delco |
| Spark Plug Gap | 0.060 in |
| Spark Plug Torque | 11 ft-lbs |
| Spark Plug Manufacturer | AC Delco |
Battery & A/C
| Refrigerant | R134a |
| Oil Group | PAG |
| Oil Type | 46 |
| Standard BCI Group Number | 78 |
| Standard BCI Cranking Performance | 600 cca |
| Standard BCI Group Number | 78 |
| Standard BCI Cranking Performance | 600 cca |
| Standard BCI Group Number | 78 DIESEL |
Service checks
| Key ON Engine OFF (KOEO) | 55-62 |
| Key ON Engine OFF (KOEO) | 50-60 |
| RPM | 43-45 @ Idle rpm |
| Injector Primary Resistance | 11-14 @ 50-90 degreesF ohms |
| Injector Primary Resistance | 11-14 @ 50-90 degreesF ohms |
| Engine Compression | 300 Minimum. Maximum variation 50 PSI. |
| Engine Compression | 100 Minimum psi |
| Engine Compression | 300 psi |
Brakes
| Torque Caliper to Bracket | 80 ft-lbs |
| Torque to Knuckle | 129 ft-lbs |
| Minimum Pad Thickness | Front: 0.030; Rear: 0.030 specification |
| Rotor Max Parallel Variation | 0.001 in |
| Rotor Runout Limit | 0.005 in |
| Rotor Nominal Thickness From | 1.142 in / 1.181 in / 1.496 in |
| Rotor Nominal Thickness To | 1.142 in / 1.181 in / 1.496 in |
| Rotor Minimum Machining | 1.102 in / 1.142 in / 1.457 in |
Multi-step torque procedures OEM · verified
Crankshaft Pulley and/or Damper Bolts — tightening sequence 1 stages
| 1 | 74 ft. lbs., step 2: 105 | 74 ft. lbs |
Cylinder Head — tightening sequence 4 stages
Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts 1-10:
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
| 2 | 90 degrees | 90 degrees |
| 3 | Bolts 1-8 | 90 degrees |
| 4 | Bolts 9and10 | 50 degrees |
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
Cylinder Head — tightening sequence 3 stages
Prep Do not reuse old bolts. Do not allow oil on cylinder head or head bolt bosses · M11 Bolts 1-10:
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
| 2 | 90 degrees | 90 degrees |
| 3 | 70 degrees; M8 Bolts 11-15: | 70 degrees |
| 1 | 22.0 ft. lbs. | 22 ft. lbs |
Cylinder Head — tightening sequence 1 stages
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 3.7 ft. lbs., step 2: 7.4 | 3.7 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
| 1 | 11 ft. lbs., step 2: 18 | 11 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
| 1 | 11 ft. lbs., Step 2: 22 | 11 ft. lbs |
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 3.7 ft. lbs., Step 2: 7.4 | 3.7 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
| 1 | 11 ft. lbs., Step 2: 18 | 11 ft. lbs |
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 3.7 ft. lbs., Step 2: 7.4 | 3.7 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
| 1 | 11 ft. lbs., Step 2: 18 | 11 ft. lbs |
Intake Manifold to Engine Bolts — tightening sequence 1 stages
| 1 | 3.7 ft. lbs., Step 2: 7.4 | 3.7 ft. lbs |
Exhaust Manifold to Cylinder Head Bolts — tightening sequence 1 stages
| 1 | 11 ft. lbs., Step 2: 18 | 11 ft. lbs |
Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.
| Every 20,000 mi | Fuel Filter (replace) |
| Every 25,000 mi | Exhaust System (Complete) (inspect) · Fuel System (inspect) |
| Every 50,000 mi | Engine Air Filter Element (replace) · Fuel Evaporative Emission Control System (inspect) |
| Every 100,000 mi | Spark Plug Wires (inspect) · Spark Plugs (replace) · Transmission Fluid & Filter (replace) |
| At 150,000 mi | Accessory Drive Belt (inspect) · Engine Coolant System (drain, flush & refill) |